java.lang.ClassCastException: class com.sun.org.apache.xerces.internal.dom.ElementNSImpl cannot be cast to class

Question

I'm trying to write a Java unit test for the below code

public class PrintnetRequestTranslator extends RequestTranslator<MutationOverviewDocRequest, RequestContent> {

public PrintnetRequestTranslator(final MutationOverviewDocRequest mutationOverviewDocRequest) {
    super(mutationOverviewDocRequest);
}

private static final JAXBContext JAXB_CONTEXT;

static {
    try {
        JAXB_CONTEXT =
                JAXBContext.newInstance("printnet.generated");
    } catch (final JAXBException ex) {
        throw new CardLimitsServiceException(ex);
    }
}



private static final String KOP_FALSE = "false";

@Override
public RequestContent translateRequest() {

    final RequestContent requestContent = new RequestContent();
    requestContent.setOutputFormat(GjOutputFormatType.PDF);

    final Delivery delivery = new Delivery();

    requestContent.setDelivery(delivery);

    delivery.setCreationDateTime(LocalDateTime.now().toString());
    final Delivery.Document document = new Delivery.Document();
    document.setName("Mutatieoverzicht");
    document.setNumberOfCopies(1);
    final Delivery.Document.GenericData genericData = new Delivery.Document.GenericData();
    final Delivery.Document.GenericData.Bank bank = new Delivery.Document.GenericData.Bank();
    bank.setBankCode(String.valueOf(getRequest().getRelationDetails().getLocalBank().getBankCode()));
    final Delivery.Document.GenericData.Clients clients = new Delivery.Document.GenericData.Clients();
    final Delivery.Document.GenericData.Clients.Client client = new Delivery.Document.GenericData.Clients.Client();

    client.setId(getRequest().getCustomerRelationId());
    client.setInitials(getRequest().getRelationDetails().getNaturalPersonDetails().getNameInitial());
    client.setSurname(getRequest().getRelationDetails().getNaturalPersonDetails().getSurname());
    client.setDateOfBirth((getRequest().getRelationDetails().getBirthDate()).toString());
    client.setGender((getRequest().getRelationDetails().getGenderCode()));

    final Delivery.Document.GenericData.Clients.Client.Address address =
            new Delivery.Document.GenericData.Clients.Client.Address();
    address.setStreet(getRequest().getRelationDetails().getAddress().getStreetName());
    address.setCity(getRequest().getRelationDetails().getAddress().getCityName());
    address.setPostCode(getRequest().getRelationDetails().getAddress().getPostalCode());
    address.setCountry(getRequest().getRelationDetails().getAddress().getCountryCode());

    client.setAddress(address);
    clients.withClients(client);
    genericData.setBank(bank);
    genericData.withClients(clients);
    document.setGenericData(genericData);

    final Delivery.Document.MutatieOverzicht mutatieOverzicht = new Delivery.Document.MutatieOverzicht();
    mutatieOverzicht
        .setTitle(ACCOUNT_TYPE_MAP.getOrDefault(getRequest().getPackageProductTypeCode(), "Rabo Rekening"));
    mutatieOverzicht.setOndertekenblokIndicator(KOP_FALSE);
    mutatieOverzicht.setVerkoopOnderVoorbehoudIndicator(KOP_FALSE);
    final Delivery.Document.MutatieOverzicht.Product product = new Delivery.Document.MutatieOverzicht.Product();

    product.getDetailRegels()
        .add(getDetails(DOCUMENT_NAME_MAP.getOrDefault(getRequest().getCardProductTypeCode(), "Rabopas"),
            JOINER_SPACE_DELIMITER, DOCUMENT_PRODUCT_NEW_VALUE, "true"));
    product.getDetailRegels()
        .add(getDetails(
            new StringJoiner(JOINER_DELIMITER).add(DOCUMENT_PRODUCT_IBAN).add(getRequest().getIban()).toString(),
            JOINER_SPACE_DELIMITER, JOINER_SPACE_DELIMITER, KOP_FALSE));
    product.getDetailRegels().add(
        getDetails(DOCUMENT_PRODUCT_PASSNUMBER, getRequest().getCardNumber(), JOINER_SPACE_DELIMITER, KOP_FALSE));
    product.getDetailRegels()
        .add(getDetails(DOCUMENT_PRODUCT_GIVENNAME, JOINER_SPACE_DELIMITER,
            getProductGivenName(getRequest().getRelationDetails(), getRequest().getRetrieveDebitCardToken()),
            KOP_FALSE));
    product.getDetailRegels()
        .add(getDetails(DOCUMENT_PRODUCT_GEALIMIT,
            new StringJoiner(JOINER_SPACE_DELIMITER).add(getFormattedAmount(getRequest().getOldAtmLimit()))
                .add(DOCUMENT_PRODUCT_EURO).toString(),
            new StringJoiner(JOINER_SPACE_DELIMITER).add(getFormattedAmount(getRequest().getNewAtmLimit()))
                .add(DOCUMENT_PRODUCT_EURO).toString(),
            KOP_FALSE));
    product.getDetailRegels().add(getDetails(DOCUMENT_PRODUCT_PERIOD, getRequest().getAtmLimitPeriod(),
        getRequest().getAtmLimitPeriod(), KOP_FALSE));
    product.getDetailRegels()
        .add(getDetails(DOCUMENT_PRODUCT_BEALIMIT,
            new StringJoiner(JOINER_SPACE_DELIMITER).add(getFormattedAmount(getRequest().getOldPosLimit()))
                .add(DOCUMENT_PRODUCT_EURO).toString(),
            new StringJoiner(JOINER_SPACE_DELIMITER).add(getFormattedAmount(getRequest().getNewPosLimit()))
                .add(DOCUMENT_PRODUCT_EURO).toString(),
            KOP_FALSE));
    product.getDetailRegels().add(getDetails(DOCUMENT_PRODUCT_PERIOD, getRequest().getPosLimitPeriod(),
        getRequest().getPosLimitPeriod(), KOP_FALSE));
    mutatieOverzicht.setProduct(product);
    document.setMutatieOverzicht(mutatieOverzicht);
    delivery.withDocuments(document);
    requestContent.setDelivery(getDocument(delivery));
    return requestContent;

}



@Override
public ServiceInfo getServiceInfo() {
    return ServiceInfo.PRINTNET_GENERATE_DOCUMENT;
}

private Delivery.Document.MutatieOverzicht.Product.DetailRegel getDetails(final String productName,
                                                                          final String oldValue,
                                                                          final String newValue, final String kop)
{
    final Delivery.Document.MutatieOverzicht.Product.DetailRegel detailRegel =
            new Delivery.Document.MutatieOverzicht.Product.DetailRegel();

    detailRegel.setOmschrijving(productName);
    detailRegel.setOudeWaarde(oldValue);
    detailRegel.setNieuweWaarde(newValue);
    detailRegel.setKop(kop);
    return detailRegel;

}

private String getProductGivenName(final RelationResponse relationDetails,
                                   final RetrieveDebitCardToken retrieveDebitCardToken)
{
    final StringJoiner productGivenName = new StringJoiner(JOINER_SPACE_DELIMITER);
    if (relationDetails.getOrganisationLegalName() == null) {
        addIfNotEmpty(productGivenName, relationDetails.getNaturalPersonDetails().getNameInitial());
        addIfNotEmpty(productGivenName, relationDetails.getNaturalPersonDetails().getSurnamePrefix());
        addIfNotEmpty(productGivenName, relationDetails.getNaturalPersonDetails().getSurname());
    } else {
        addIfNotEmpty(productGivenName, retrieveDebitCardToken.getTokenText1());
    }
    return productGivenName.toString();
}

private void addIfNotEmpty(final StringJoiner stringJoiner, final String join) {
    if (StringUtils.isNotEmpty(join)) {
        stringJoiner.add(join);
    }
}

private Element getDocument(final Object any) {
    try {
        final DocumentBuilderFactory df = DocumentBuilderFactory.newInstance();
        df.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
        df.setAttribute(XMLConstants.ACCESS_EXTERNAL_SCHEMA, "");
        final DocumentBuilder db = df.newDocumentBuilder();

        final org.w3c.dom.Document document = db.newDocument();
        final Marshaller marshaller = JAXB_CONTEXT.createMarshaller();

        marshaller.marshal(any, document);
        return document.getDocumentElement();
    } catch (final ParserConfigurationException | JAXBException ex) {
        throw new CardLimitsServiceException(ex);
    }
}

}

Here is the RequestContent Class

 @XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "outputFormat",
    "delivery"
})
@XmlRootElement(name = "RequestContent")
public class RequestContent {

    @XmlElement(name = "OutputFormat", required = true)
    @XmlSchemaType(name = "string")
    protected GjOutputFormatType outputFormat;
    @XmlElement(name = "Delivery", required = true)
    protected Object delivery;

    /**
     * Gets the value of the outputFormat property.
     * 
     * @return
     *     possible object is
     *     {@link GjOutputFormatType }
     *     
     */
    public GjOutputFormatType getOutputFormat() {
        return outputFormat;
    }

    /**
     * Sets the value of the outputFormat property.
     * 
     * @param value
     *     allowed object is
     *     {@link GjOutputFormatType }
     *     
     */
    public void setOutputFormat(GjOutputFormatType value) {
        this.outputFormat = value;
    }

    /**
     * Gets the value of the delivery property.
     * 
     * @return
     *     possible object is
     *     {@link Object }
     *     
     */
    public Object getDelivery() {
        return delivery;
    }

    /**
     * Sets the value of the delivery property.
     * 
     * @param value
     *     allowed object is
     *     {@link Object }
     *     
     */
    public void setDelivery(Object value) {
        this.delivery = value;
    }

    public RequestContent withOutputFormat(GjOutputFormatType value) {
        setOutputFormat(value);
        return this;
    }

    public RequestContent withDelivery(Object value) {
        setDelivery(value);
        return this;
    }

}

Here is my unit test code

class PrintnetRequestTranslatorTest {

private PrintnetRequestTranslator classUnderTest;

@BeforeEach
void setup() {
    classUnderTest = new PrintnetRequestTranslator(TestData.mockMutationDocumentRequest());
}

@Test
@DisplayName("Printnet Translator Success Scenario")
void testPrintnetRequestSuccess() {
    final var result = classUnderTest.translateRequest();
    final Delivery delivery = (Delivery) result.getDelivery();
    assertAll("Printnet Request Translator Test : ",
        () -> assertEquals(TestUtils.PRINTNET_OUTPUT_FORMAT, result.getOutputFormat().toString()));

}

}

I'm getting the below error when I' trying to cast Delivery class. java.lang.ClassCastException: class com.sun.org.apache.xerces.internal.dom.ElementNSImpl cannot be cast to class printnet.generated.Delivery (com.sun.org.apache.xerces.internal.dom.ElementNSImpl is in module java.xml of loader 'bootstrap'; ......printnet.generated.Delivery is in unnamed module of loader 'app')

How can I solve this error/write a unit test for the above class?

Answer 1

I had the same exception, and noticed, that my unmarshaller left the ElementNSImpl instead of my own class in the list.

The second answer in this post Intermittent ClassCastException from ElementNSImpl to own type during unmarshalling solved it for me.